Boiler-furnace.



110.897,446. PATENTED s EPT.1,19oa. 0.11. BEAN.

BOILER FURNACE. Arrmculn FILED Ammo, 1907.

' s annu-snm s.

UNITED sTATEs PATENT oEEIoE.

ORESTES U. BEAN, OF NEW YORK, N. Y., ASSIGNOR TO BUNSEN SMOKELESS FURNAOE COMPANY OF AMERICA, A CORPORATION OF SOUTH DAKOTA.

B OILER-FURNAGE Specification of Letters Patent.

Patented' Sept. 1, 1908.

Application filed A11-gust 29, 1907. Serial No. 990,631.

T o all lwhom 'it may concern:

Be it known that I, OEEsTEs U. BEAN, citizen of the United States, residing at New York, in the county of New York and' State of New York, have invented certain new and useful Im rovernents in Boiler- Furnaces, of which t e following is a speci fication.

life of the boilers is prolonged by the more nearly equal distribution of the heat to all parts of the boiler sheets and tubes.

' With these and otherobjects in view my invention consists in certain constructions, combinations and arrangements of parts, the preferred form' of which will be first described in connection with the accompanying drawings and then the invention particularly pointed out in the claims.

Referring to the drawings wherein I show one form of my invention and wherein the 4same part is designated by the same reference numeral wherever 1t occurs, Flgure 1 1s a central longitudinal section ,of a furnace embodying my invention, the boiler bein shown in elevation; Fig.. 2 is a horizonta section of the furnace taken o n line 2, 2 of Fig. 1; Fig. 3 is a transverse section taken on line 3, 3 of Fig. 1.

1 is the fire-box provided with horizontal ate sections r2, below which is the ash pit 3. gn the sides of the horizontal grate sections 2 I provide inclined supplemental grate seotions 4. These'incline grate sectlons referably extend up .to about the height o the firecarried on the grates', and thereby admit an increased amount of air to the fire.

5.is a-brid e wall of ordinary construction which likewise extends up4 to the normal height ofthe fire.

On top of the brid e wall I. provide a series of piers 7 pre erably triangular in cross-section, the polnts of thetriangles facing the fire box. These trlanguiar iers extend up tothe refractory cover 8, which preferably extends between the top ofthe furnace and the tubes in the boiler.

These piers form a series of openingsQ, ythe aggregate area of which should correspond to the area of the uptake of the boiler. These o enings 9 operate by their form to intimate y intermingle the carbon and oxygen remaining unmixed after primar combustion in the fire box is complete This produces a chemical union between the carbon and oxygen and produces further combustion in t e portion of the furnace beyond these piers.

To the rear of the bridge wall 5 I provide a series of piers 10 which, preferably, and as shown are rectangular in cross sect1o`n, these piers being located in line with the openings 9V between the piers 7. These piers deflect the streams of mixed gases passing through the openings 9, and further mix the same,

thus assisting the combustion. These piers preferably, .and as shown, do not extend up to the refractory cover S-,but a s ace is left over the tops of these piers as best s own in Fig. 1.

To the rear of the piers 10, I build u t1 ht against the refractory cover8 a second ri ge wall 11, through which I provide a-series of openings 12 in line with the openings 9, and

consequently 4behind the piers 10. Preferably, and as shown, these openings are 'of dovetail form in cross section, with their smaller ends facing the piers 10. The cross sectional area of these openings preferablycorresponds to the cross sectional area of the openings 9. Fromthis construction it willbe seen that between the bridge walls 5 and 1 1 a second cornbustion or regenerative chamber 13 is formed in which the com lete combustion-of all gases passing out of 'tiie fire box is effected.- In order to supply air to pro erly support the combustion in this second c .iamber 13 I provide an air passa e 14 in the bridge wal 5, said passages lea ing from the ash pit 3. v

15 denotes a damper by means of which the suppl of air to the passages 14 is c011- trolled. Th any suitable manner, as for Instance by means of the lever 16 indicated at the side of the furnace.

18 designates air. assages extending from -the passages 14 in tliiebrldgc wall -5, to the upper portionof the piers 10, and 19designates twyers extending from the sides of the piers 7 and into the openings 9, said twyers eing' connected with the air pass es or ducts 14, whereby air is -mixed witi the gases as thev Dass through the oneninvn Q;

is damper may be operated in lpassa e into-and thr vIn addition 'be the'v referred form of In 20 designatesV twyers mounted-in the of the iers 10 .and .connected to the 18 in t e iers 1 0, whereby further pliedi'n t efchamber 13.

B. the construction above described it will e seen'that the unconsumed ing out of theiire' box will be I nlxed together, andmorei air added'in t ough the secondary cham er 13, and that for this reason the combustion will be practically complete. to this, b ecause of the inclined grate sections in the sides of the main grate gases passva larger amount of air will be' fed to the fire on the grates than wouldbe the case were flatate sections used.

' e IT have described what I believe to invention, I deat many changes sire to ave it understood t construction and may be made in the form, arrangement of parts without departing from the spirit of my invention.

hat I claim as new and desire to secure by'Let'ters Patent is:

1. In a boiler furnace the combination with a fire box, of a bridge wall in the rear of `I said fire box, a combustion chamberin the Afrom the bottom ofgthe rear of said bridge wall, aseries of piers separatedfrom-each other mounted on top of the bridge wall and extending from the top of the bridge Wall to the lower surface of theboiler, whereby a plurality of restricted o enings are formed for the passage of the pro ucts of combustion,- asecond series of piers located adjacent tothe bridge Wall and extending i combustion chamber 'to afheight less than the height of theV top of :Said re bOx, a combustion chamber in the whereby a plurality of restricted o rear of said bridge wall, a. series of piers sepa rated from each other mounted on top of the brid'ge walland extending from the top of the bridge Wall to the lower surface of the boiler, enings are formed for the passage of the pro ucts of combustion, a second series of plers located adjacent to the bridge 'wall and extending from the bottom of the combustion chamber to a height less than the height of the top of the-first mentioned iers and in line with the restricted openings etween the first series of piers,- said. bridge Wall being provided with an air chamber, both of said series of piers being I' provided with air channels having-suitable outlets and connected to the air chamber in the bridge wall, lsaid bridge wall bei ro- 35 vided with .an opening from the ash-plt to -contro the supply of air. 3. In a `boiler -furnace the combination with a fire box, of'a bridge wall in the rear ofv thorou Vhly ox, a combustion chamber in the eir . bridge wall'and extending from the piers separated openings between the first lthe air chamber by which air supplied to'- havingA 'itsf'op'eri urnace tnth'e chamber,

and a damper ating art extending outside the said fire b rear of said bridge wall, a series of piers separated from each other mounted on top'of the bridge wall and `extending from the top of the bridge Wall to the lower surface of the boiler, whereby a plurality of restricted openings are formed for the passage of the products' of combustion, a second series of plers located adjacent to the bridge wall and extending from the bottom ofthe combustion chamber to a height less than the height of the top of the first mentioned iers andin line with the restricted openings etween the first series of piers, said bridge wall being provided with an air chamber, and both of said series of piers being provided with air piers being located on the sides thereof, and the outlets on the second mentioned piers being located in the top thereof and connected to the air chamber in the bridge wall. 4. In a boiler furnace the combination with the fire box, of abridge wall to the rear' of said fire vb ox, a series of piers separated from each other mounted on top of the channels having suitable outlets, the outlets inthe first mentioned top ofthe bridge wall to the lower surface of the'boiler whereby restricted openings are formed for the passage of the products of combustion,` a series of piers to the rea!` ofand adjacent'to said bridge wall and in line with the restricted openings, a second-bridgewall to the rear of said last mentioned piers,'said bridge wallhaving a series of restricted openings therei through in line with lsaid last mentioned piers.

5. In a boiler furnace the `combination with a fire box, of a bridge Wallin the rear of said re box, a combusti'onchamber in the rear of said bridge wall, a series of polygonal top of the bridge Wall and extending' from the to of thebridge Wall to the lowersurface o the boiler, whereby a lurality of re-' stricted openings are formed or thepassagea second series ofthe products of combustion, of olygonal piers located adjacent to the bri ge wall and extending from the bottom of the combustion chamber tol a height less than the height of the top of the first menrom each other mounted on tioned piers and inline with the restricted series of said bridge wall being provided with chamber, and both of said series of bei provided with air channels having 'suita le outlets and connected to the air chamber inthe bridge wall.

6. In a boiler furnace 'the combination with a fire box, of a bridge wall in the rear of piers, an all plers 'said fire box, a combustion chamber in the `rear of said bri ofthe oiler,'where v a plurality of restricted openings are forme for the vpassage of the prcl ducts of combustion, a second series of o ri e wall'and extending from the bottom of the combustion chamber to a height less than the height of the top of the first mentioned piers andin line with the restricted openings between the first series of piers, said bridge wall being provided with an air chamber, both ofsald series of piers being pro-V vlded with air channels having suitable outlets, the loutlets in the first mentioned iers being located on the-sides thereof an the outlets located the tcp thereof and connected to the air chamber m the bridge' wall.

7. In a boiler furnace the combination l withl the fire box, of a bridge wall to the rear onal piers located adjacent to the of piers bein the second mentioned piers being of said fire box, a sexies Lof piers separated from each otherv mounted on to of the bridge wall and extending from t e top of the bridge wall to the lower surface of the boiler whereby restricted openingsare formed for the passage of the products of combustion, a series of piers to the rear of and adjacent to said bridge Wall and inline with Y the restricted openings, a second bridge wall to the rear of said last mentioned piers, said bridge wall having a series of restricted openings therethrough inline with said last men'- tioned piers` said bridge wall being provided with an air chamber, and both of said series provided with air channels having suitab e outlets and connected to the air chamber in the bridge wall.

In testimony whereof I aiiix my signature in presence of two witnesses.

ORESTES U. BEAN. 

